feat: status translation overrides via YAML config

report.status_translation in YAML config overrides/extends the builtin
STATUS_TRANSLATION dictionary; without the section behavior is unchanged.

- AppConfig.report_status_translation + _resolve_str_dict (warns and
  skips non-scalar values, resolves ${VAR} references)
- Config.get_status_translation() returns merged copy (lazy import,
  builtin dict never mutated)
- build_grouped_report() accepts optional status_translation parameter
- --init-config template gains commented example, docs/CONFIG.md updated

Closes #65

tests/test_cli.py

@@ -483,6 +483,55 @@ class TestInitConfig:
         assert "report" in data
         assert data["report"]["no_time"] is False
 
+    @mock.patch.dict(os.environ, VALID_ENV, clear=True)
+    def test_init_config_includes_status_translation_example(self, tmp_path):
+        """#65: --init-config дописывает закомментированный пример status_translation.
+
+        Файл остаётся валидным YAML, активной секции status_translation нет.
+        """
+        import yaml
+
+        config_path = tmp_path / "config.yml"
+        code = main(["--init-config", "--config-path", str(config_path)])
+        assert code == 0
+
+        text = config_path.read_text(encoding="utf-8")
+        assert "#   status_translation:" in text
+
+        with open(config_path) as fh:
+            data = yaml.safe_load(fh)
+
+        assert "status_translation" not in data["report"]
+
+
+@mock.patch.dict(os.environ, VALID_ENV, clear=True)
+@mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")
+def test_cli_status_translation_from_yaml_reaches_builder(mock_fetch, tmp_path):
+    """#65: report.status_translation из YAML доезжает до build_grouped_report."""
+    issue = _MockIssue()
+    mock_fetch.return_value = [(issue, 1.0, None)]
+    config_path = tmp_path / "config.yml"
+    config_path.write_text(
+        "report:\n"
+        "  status_translation:\n"
+        '    New: "Новая"\n'
+        '    "Custom Status": "Кастом"\n'
+    )
+
+    with mock.patch("redmine_reporter.cli.build_grouped_report") as mock_build:
+        mock_build.return_value = []
+        code = main(
+            ["--date", "2026-01-01--2026-01-31", "--config-path", str(config_path)]
+        )
+
+    assert code == 0
+    _, kwargs = mock_build.call_args
+    translation = kwargs["status_translation"]
+    assert translation["New"] == "Новая"
+    assert translation["Custom Status"] == "Кастом"
+    # встроенные переводы сохранились
+    assert translation["Closed"] == "Закрыто"
+
 
 @mock.patch.dict(os.environ, {}, clear=True)
 @mock.patch("redmine_reporter.cli.fetch_issues_with_spent_time")